KR100364066B1 - Gasborne component condensing apparatus - Google Patents

Abstract

The adsorption process of adsorb | sucking the to-be-concentrated component in a to-be-processed gas to the adsorbent layers 4 and 34, and the adsorption layer which completed the adsorption process pass the desorption gas which is hotter than the to-be-processed gas at a small air volume, A concentration apparatus for repeating the desorption process of desorbing the concentrated component adsorbed to the adsorbent layer (4,34) in the desorption gas in the adsorption process. The desorption gas sent out from the adsorbent layer is recovered as a product concentrated gas. Characteristic of this concentrating device is that the gas for desorption sent out from the adsorbent layer in the desorption process is the initial passage gas Hof which has passed through the adsorbent layer at the beginning of the desorption process, and the late passage gas Hor which has passed through the adsorbent layer at the end of the desorption process. It is to have a means 18 to divide into. The separated initial pass gas Hof is passed as part of the gas to be treated again to the adsorbent layers 4,34 in the subsequent adsorption process, and the late pass gas Hor is recovered as the product concentrated gas.

Description

Air component concentrator {GASBORNE COMPONENT CONDENSING APPARATUS}

TECHNICAL FIELD This invention relates to the air component concentration apparatus used for the concentration process of various solvent vapors contained in exhaust air from a coating facility or an electronic component manufacturing facility.

More specifically, in order to concentrate the to-be-concentrated component contained in the to-be-processed gas,

The amount of air generated in the adsorption layer for allowing the target gas to pass through the adsorbent layer and adsorbing the concentrated component in the target gas to the adsorbent layer, and the adsorbent layer after the adsorption step is smaller than the target gas. The desorption gas is passed through a high-temperature desorption gas, and the desorption process of desorbing the concentrated component adsorbed on the adsorbent layer in the desorption gas in the adsorption process is repeated, and the desorption process desorbs in the desorption process. It is related with the air component concentration apparatus which can collect | recover the said desorption gas sent from the said adsorbent layer as a product concentration gas.

Conventionally, in this type of air component concentrating device, the total amount of desorption gas passed through the adsorbent layer in the desorption process (that is, the total amount of desorption gas sent out from the adsorbent layer including the concentrated component desorbed from the adsorbent layer). Was taken out as the product concentration gas.

However, when comparing the initial stage and the late stage of the desorption process, in the early stage of the desorption process, the temperature of the adsorbent layer is still low, and the high temperature desorption gas that is passed through the adsorbent layer is also consumed to raise the temperature of the adsorbent layer. Deteriorates, so that desorption of the concentrated component adsorbed on the adsorbent layer does not proceed efficiently. Therefore, at the beginning of the desorption process, the desorption gas having a low concentration of the concentrated component is sent out from the adsorbent layer as compared with the latter stage of the desorption process. For this reason, in the conventional apparatus, the average concentration of the components to be concentrated in the transmission desorption gas (that is, the product concentrated gas) as the entire desorption process throughout the initial stage and subsequent stages of the desorption process cannot be sufficiently increased. There was a problem that the concentration magnification of the concentration apparatus is limited to low.

In addition, considering the case of performing the post-treatment on the product concentrated gas taken out from the airborne component concentration apparatus, the concentration magnification in the concentration treatment as the pre-treatment is limited as low as described above. The post-processing apparatus of larger processing capacity is needed, and apparatus cost and running cost become high. Moreover, there existed a problem that the installation space of a device became large. For example, when the post-treatment is an incineration treatment in which the concentrated component contained in the blown-out concentrated gas is burned, the concentration of the solvent vapor as the concentrated component is not sufficiently high, so that a large amount of supporting medium is used for combustion. ) There was a problem that it requires fuel.

An object of the present invention is to effectively increase the concentration magnification without causing an increase in the size of the apparatus and a decrease in the processing capacity in this kind of airborne component concentration apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a gas treatment facility equipped with an airborne component concentrating device of the present invention.

2 is an exploded view in plan view of the adsorption rotor portion;

3 is a perspective view of a suction rotor part;

4 is a configuration diagram of an exhaust gas treatment system having a gas component concentrating device and a gas turbine of the present invention.

In order to solve the said subject, the air component concentrating apparatus by invention of Claim 1 is

The desorption gas sent from the adsorbent layer in the desorption process is divided into an initial passage gas passing through the adsorbent layer at the beginning of the desorption process and a late passage gas passing through the adsorbent layer at the end of the desorption process. Thus, the initial passage gas obtained by the division is passed through the adsorbent layer again in the subsequent adsorption process as a part of the target gas, and with respect to the late passage gas, this is taken out as a product concentrated gas. It is characterized by having a gas discriminating means.

That is, in this structure, the desorption gas sent out from the adsorbent layer in the desorption process passes through the adsorbent layer at the beginning of the desorption process in which the desorbed components of the concentrated component from the adsorbent layer are not efficiently carried out at a low temperature of the adsorbent layer. Desorption of the concentrated component from the adsorbent layer is carried out efficiently with one initial passage gas (that is, the desorption gas sent out from the adsorbent layer with both the concentration of the component to be concentrated and the gas temperature low) and the adsorbent layer already sufficiently heated. Is classified into a late pass gas (that is, a desorption gas sent out from the adsorbent layer in a state where both the concentration of the concentrated component and the gas temperature are high) that passed through the adsorbent layer at the end of the desorption process.

And since the concentration of the component to be concentrated is low with respect to the initial passage gas, the concentrated component contained by passing it through the adsorbent layer again in the repeated adsorption process in a state where this is part of the target gas is adsorbed to the adsorbent layer again. Thereafter, the concentrated component for desorbing the adsorbed concentrated component to a high-temperature desorption gas at a small amount of excretion is again performed, and the late-pass gas sent out from the adsorbent layer in a state where the concentration of the concentrated component is high. About this, this is taken out as a product concentration gas by a concentration process.

Then, if the point of distinction between the initial passage gas and the late passage gas is appropriately selected, both the concentration of the concentrated component and the gas temperature of the initial passage gas can be made very low. In addition, since the desorption gas itself is the amount of excitation, and the initial passage gas is more the amount of excitation, the initial passage gas is allowed to pass through the adsorbent layer of the adsorption process as part of the to-be-processed gas, so that the processing load in the adsorption process The decrease in the adsorption capacity due to the increase in the temperature and the increase in the gas temperature can be made slight. By using the above two methods suitably, the function which adsorbs and collects the to-be-concentrated component contained in the original to-be-processed gas can fully be maintained.

Therefore, according to the invention according to claim 1, as described above, among the desorption gas passing through the adsorbent layer in the desorption process, the initial passage gas sent out from the adsorbent layer in a state where the concentration of the component to be concentrated is low is again concentrated. In addition, since the process form which takes out only the late passage gas sent out from an adsorbent layer in the state with high concentration of a concentrated component as a production | generation concentrate gas is employ | adopted, the concentrated gas produced as it is is carried out as the whole quantity of the desorption gas which passed the adsorbent layer in the desorption process as it is. Compared with the conventional apparatus which is taken out as a die, it does not increase the size of the adsorbent layer due to thickening of the adsorbent layer or the like and hardly decreases the processing capacity, so that the concentration magnification of the concentration treatment can be effectively increased.

And even if the post-treatment is carried out to the product concentrated gas taken out from the concentration apparatus, since the concentration magnification in the concentration treatment as the pre-treatment is effectively improved as described above, an extra large processing capacity is obtained for the post-treatment apparatus. Not required. As a result, the device cost and running cost can be greatly reduced, and the installation space of the device can be greatly reduced.

In addition, if the above-described configuration of the present invention according to claim 1 is applied to a conventional concentrating device which takes out the entire amount of the desorption gas that has passed through the adsorbent layer in the desorption process as a produced concentrated gas, the change of the adsorbent layer is not accompanied. In addition, almost no decrease in the treatment capacity can be achieved, and the concentration magnification can be easily doubled. That is, for example, if the conventional concentration apparatus has a concentration magnification of about 20 times, the concentration magnification after application of the above configuration of the present invention according to claim 1 is increased to about 40 times.

In order to pass the initial passage gas as a part of the gas to be processed again to the adsorbent layer in the subsequent adsorption process, the initial passage gas passes through the adsorbent layer in the original adsorption process. The form which mixes with a to-be-processed gas can be employ | adopted. In addition, you may employ | adopt the form which changes the timing which passes an adsorbent layer in an adsorption process, or the form which passes another part in an adsorbent layer between a virgin to-be-processed gas and an initial passage gas.

Moreover, in order to solve said subject, in invention of Claim 2,

In addition, the adsorbent layer has a rotatable adsorption rotor for supporting the adsorbent layer, the adsorbent layer extends in the rotational direction of the adsorption rotor, and the rotation path of the adsorption rotor includes the target gas being passed in a predetermined region. Adsorption treatment area | region which passes the said adsorption agent layer of the site | part of the said adsorption rotor, and desorption treatment area | region which let the said desorption gas pass to the said adsorption agent layer of the site | part of the said adsorption rotor in the middle of a predetermined | prescribed area pass by the rotor rotation direction Installed; And

The gas separating means,

A partitioning partition that divides the outlet of the desorption gas in the desorption treatment region into an upper outlet portion located above the rotor rotation direction and a lower outlet portion located below the rotor rotation direction;

A convoy path leading the desorption gas sent from the upper outlet portion to an inlet of the gas to be processed in the adsorption treatment region; And

And a take-out path for recovering the desorption gas sent from the lower outlet portion as a product concentration gas.

That is, in this structure, the adsorbent layer of each part of the adsorption rotor has the period which passes through the said adsorption process area | region in a rotor rotation path as an adsorption process which adsorb | sucks a to-be-concentrated component from a to-be-processed gas, and also in the rotor rotation path | route. The period of time passing through the desorption treatment region may be a desorption process of desorbing the adsorbed concentrated component to the desorption gas. Therefore, as the adsorption rotor rotates, in the adsorbent layer in each of the adsorption rotors, the adsorption treatment in which adsorption in the adsorption treatment region and desorption in the desorption treatment region are alternately repeated to collect and collect the concentrated component from the target gas. Treatment in the region (namely, shearing treatment in the concentration treatment) and treatment in the desorption treatment region in which the concentrated components adsorbed and collected are desorbed and released to the desorption gas having a small amount of excretion. Subsequent processing) is performed in parallel, in other words, very efficiently.

In addition, by separating the outlet gas of the desorption gas in the desorption treatment region into partitions into an upper outlet portion located above the rotor rotation direction and a lower outlet portion located below the rotor rotation direction, An initial passage gas passing through the adsorbent layer at the beginning of the desorption process, ie, the desorption gas passing through the adsorbent layer in the rotor portion of the rotor part, which is sent out from the upper outlet portion, The late pass gas (that is, the desorption gas that has passed through the adsorbent layer in the rotor portion after entering the desorption treatment region and advancing into the region to some extent) passing through the adsorbent layer at the end of the desorption process exiting from the lower outlet portion can be separated. There is a number.

And for the desorption gas (initial passage gas which is sent out in a state where both the concentration component concentration and gas temperature are low) sent from the upper outlet part, this is guide | induced to the inlet of the to-be-processed gas in an adsorption process area | region through a return path. Therefore, this is a part of the gas to be treated, and passes again through the adsorbent layer (adsorbent layer in the adsorption process) of the adsorption rotor portion which is in the middle of the passage within the predetermined region of the adsorption treatment region, and performs concentration treatment on the initial passage gas again. can do. On the other hand, for the desorption gas (post-pass gas sent out in a state where both the concentrated component concentration and the gas temperature are high) sent out from the lower outlet portion, it is recovered from the apparatus through the take-out path as the product concentrated gas by the concentration treatment. do.

That is, according to the invention according to claim 2, as described above, the front end treatment of adsorption-collecting the concentrated component from the gas to be treated and the post-stage treatment of the adsorption-collected concentrated component to be desorbed and released to the desorption gas are continuously performed. By carrying out, the ventilation operation of the to-be-processed gas and the ventilation operation of the gas for desorption can be continued. As a result, the adsorption-and-desorption concentration process becomes a continuous process with good efficiency.

And the desorption gas sent out from a desorption process area | region by the division means which consists of a partition, a return air path, and a blowout air path, the initial passage gas which should be concentrated again as a part of the to-be-processed gas, and the generated concentrated gas By dividing into the late pass gas to be taken out as, the effect of the invention according to claim 1, the high concentration magnification can be normally obtained in the continuous concentration treatment.

And the desorption gas sent as an initial passage gas from an upper outlet part is guide | induced to the inlet of the to-be-processed gas in an adsorption process area | region through a return air flow path, and this is made into a part of to-be-processed gas in the adsorption process area | region. In passing the adsorbent layer in the passage rotor portion, the desorbing gas sent from the upper outlet portion is passed through the adsorbent layer in the passage rotor portion in the adsorption treatment region in a state in which the gas for desorption is mixed with the to-be-processed gas. The form can be adopted. Or you may employ | adopt the form which makes it pass through an adsorbent layer between the desorption gas sent out from this upper outlet part, and the to-be-processed gas of virgin, and passes the other part in an adsorption process area | region.

EMBODIMENT OF THE INVENTION The airborne component concentration apparatus by this invention is demonstrated, referring an accompanying drawing.

(Overall Configuration of Gas Treatment Facility)

FIG. 1 shows a gas treatment facility for treating air Ai discharged from a painting facility in a state containing steam of a paint solvent. The gas treatment plant post-processes the concentrating device 1 for concentrating the solvent vapor contained in the air to be treated and the concentrated air Hor whose concentration of the solvent vapor is increased in accordance with the condensation treatment by the concentrating device 1. The catalytic combustion device 2 is provided.

(Configuration of Thickener)

1, as shown in FIG. 1, FIG. 2, FIG. 3, the external shape is a adsorption-and-desorption type | mold provided with the adsorption rotor 3 of columnar or disk shape. A plurality of adsorption cassettes 5 are supported by the adsorption rotor 3 in a state where they are provided side by side in the rotor rotation direction. The individual adsorption cassettes 5 are generally cylindrical having a bottom, and an adsorbent layer 4 made of fibrous activated carbon is provided in the periphery thereof.

The suction rotor 3 is built in the casing 6. The inside of the casing 6 has a pair of rotor periphery partitions 7 (extended vertically in the embodiment of the figure) disposed at each of one end face portion and the other end face portion of the suction rotor 3. Thus, the inlet chamber 8 facing the one end surface of the suction rotor 3 and the other end surface of the suction rotor 3 according to the shaft center of the suction rotor 3 (which extends horizontally in the embodiment of the figure). It is divided into the exit chamber 9 which faced, and the adsorption rotor storage chamber clamped by these inlet chamber 8 and the exit chamber 9. As shown in FIG. The introduction passage 10 of the processing air Ai is connected to the inlet chamber 8, and the discharge passage 11 of the processed air Ao is connected to the outlet chamber 9.

In addition, the desorption air Hi is adsorbed in the casing 6 in a different direction from the introduction path 10 and the discharge path 11 with respect to the rotational direction of the adsorption rotor 3 in the passage direction opposite to the processing air Ai. The air passage structure for passing through the rotor 3 is formed. The air passage structure includes an inlet chamber 12 for introducing desorption air Hi into the adsorption rotor 3, and for deriving the desorption air Hi once entered into the adsorption rotor 3 out of the adsorption rotor 3 again. It consists of an outlet chamber 13. The inlet chamber 12 and the outlet chamber 13 are opposingly arranged so that a part of the suction rotor 3 may be sandwiched between these openings. And the inlet chamber 12 arrange | positioned at the exit chamber 9 side is connected to the inflow path 14 of the air Hi for removal, and the suction chamber 13 is provided to the outlet chamber 13 provided in the inlet chamber 8 side. The extraction path 15 which collects the desorption air Hi which passed through (3) as produced | generated concentrated air Hor is connected.

That is, as shown by the arrow in FIG. 3, in this concentrating device 1, each end surface of the adsorption rotor 3 is the inlet chamber 8 inside the casing 6 in the rotation path of the adsorption rotor 3. And the exit chamber 9 and the region facing the open state (in this embodiment, the angular region) are the adsorption treatment region 16, and a part of the adsorption rotor 3 is the inlet chamber 12 of the desorbable air Hi. And the area (angle area in this embodiment) which communicates with the exit chamber 13 are the desorption process area 17.

In the adsorption process region 16, the to-be-processed air Ai introduce | transduced into the inlet chamber 8 from the inflow path 10 passes through the adsorption agent layer 4 of the adsorption rotor part in the middle of the passage. Therefore, in the period in which the air to be treated Ai passes through the adsorption treatment region 16 with respect to the adsorbent layer 4 in each portion of the adsorption rotor, the target air is passed through the adsorbent layer 4 at the site. An adsorption process is performed in which the solvent vapor in Ai is adsorbed to the adsorbent layer 4. The solvent vapor in the air Ai to be treated is adsorbed by the adsorbent constituting the adsorbent layer 4.

On the other hand, in the desorption process region 17, the high temperature desorption air Hi introduced into the inlet chamber 12 from the inlet passage 14 passes through the adsorbent layer 4 of the rotor portion in the middle of the passage. Therefore, in the period in which the desorption air Hi passes through the desorption treatment region 17 with respect to the adsorbent layers 4 of the adsorption rotors, the high temperature desorption air Hi passes through the adsorbent layer 4 so that the adsorbent layer ( The adsorption solvent vapor of 4) is desorbed into desorption air Hi.

As described above, as the adsorption rotor 3 rotates, the adsorption operation in the adsorption treatment region 16 and the desorption operation in the desorption treatment region 17 are alternately repeated with respect to the adsorbent layer 4 of each portion of the adsorption rotor. The treatment in the adsorption treatment region 16 for absorbing and collecting the solvent vapor from the target gas Ai and the treatment in the desorption treatment region 17 for desorbing and releasing the solvent vapor trapped in the adsorption to the desorption gas Hi are performed in parallel. It is done continuously.

And in this adsorption operation and desorption operation, the air volume of the desorption air Hi which passes through the adsorbent layer 4 in the desorption process area | region 17 passes through the adsorbent layer 4 in the adsorption process area | region 16. It is comprised so that a wind volume may be more than the air volume of process air Ai. As a result, the solvent vapor concentration of the desorption air Ho sent out from the desorption treatment region 17 to the outlet chamber 13 is controlled by the target air Ai before the treatment to be passed to the adsorbent layer 4 in the adsorption treatment region 16. It becomes higher than the solvent vapor concentration. On the other hand, by passing through the adsorbent layer 4 in the adsorption treatment region 16, the to-be-processed air Ao sent to the exit chamber 9 in the state in which the solvent vapor was removed according to the adsorption collection of the adsorbent layer 4, The purified air is discharged to the outside through the discharge passage 11.

In this concentrating apparatus 1, the partition chamber 18 which divides the inside into the upper chamber 13a and the lower chamber 13b regarding the adsorption rotor rotation direction is provided in the exit chamber 13. As shown in FIG. The partition 18 has a plate shape extending in the radial direction of the adsorption rotor 3, and the outlet of the desorption air Ho in the desorption treatment region 17 is located above the rotational direction of the adsorption rotor. The upper outlet portion 19a and the lower outlet portion 19b positioned below the suction rotor rotation direction are partitioned.

Desorption air Ho which passed through the adsorption rotor part which entered the desorption process area | region 17 just from the upper exit part 19a (this is with the desorption air which passed the adsorbent layer at the beginning of a desorption process). From the meaning, the initial passage air Hof) is sent out. That is, since the temperature of the adsorbent layer 4 of the adsorption rotor portion just entered the desorption treatment region 17 is not high enough, most of the heat of desorption air Hi entering the high temperature is raised to the elevated temperature of the adsorbent layer. The consumption and the temperature of the desorption air Hi fall significantly. Therefore, in the desorption air Hi passing through the adsorption rotor portion just entering the desorption treatment region 17, desorption of the concentrated component does not proceed efficiently, and consequently, the concentrated component of the initial passage air Hof. The concentration is relatively low.

On the other hand, from the lower exit portion 19b, the desorption air Ho, which has passed through the adsorption rotor portion supported in the area for a while after entering the desorption treatment region 17, is mainly passed through the adsorbent layer later in the desorption process. The late pass air Hor is called) from the meaning with the one removable air. That is, since the temperature of the adsorbent layer 4 of the adsorption rotor portion supported in the area for a while after entering the desorption treatment region 17 is sufficiently high, the heat of retention of the desorbed air Hi which has entered the high temperature rises in the temperature of the adsorbent layer. Is not consumed and the temperature is not significantly reduced. Therefore, in the desorption air Hi passing through the adsorption rotor portion supported in the region for a while after entering the desorption treatment region 17, desorption of the components to be concentrated proceeds efficiently, so that the concentration of the concentration of the components of the late passage air Hor is increased. Becomes relatively high.

And the discharge port 20 is provided in the side surface of the upper chamber 13a connected to the upper outlet part 19a. The discharge port 20 faces a direction crossing the straight gas path extending from the inlet chamber 12 to the outlet chamber 13 and is open to the inlet chamber 8 that receives the air Ai to be processed. . Therefore, this discharge port 20 functions as a return path which returns the total amount of the initial passage air Hof received in the upper chamber 13a to the inlet chamber 8.

In addition, since the lower chamber 13b connected to the lower outlet portion 19b of the outlet chamber 13 communicates with the blowout passage 15 of the generated concentrated air, the late passage received in the lower chamber 13b. The total amount of air Hor is recovered from the blowout passage 15.

That is, for the initial passage air Hof that has passed through the adsorbent layer 4 at the beginning of the desorption process, the solvent vapor concentration is low and the temperature decreases too much, so that it is discharged into the inlet chamber 8 through the discharge port 20. By passing the adsorption treatment region 16 again while being mixed with the target air Ai supplied from the introduction passage 10, the concentration treatment is performed again. The late-pass air Hor which has passed through the adsorbent layer 4 in the late stage of the desorption process has a high solvent vapor concentration, and is thus configured to recover this as the generated concentrated air through the blowout passage 15. In this way, a high concentration magnification can be obtained by performing the return operation of the initial passage air Hof to the inlet chamber 8 and the recovery operation of the later passage air Hor in parallel.

As shown in FIG. 3, the inside of the adsorption rotor 3 is equipped with the some adsorption cassette mounting chamber in the rotor rotation direction by the some partition wall 21 radially extended from the rotation axis center of the adsorption rotor 3 ( 22). In addition, in both side portions of each of the inlet chamber 12 and the outlet chamber 13, only the angular region corresponding to one portion of the adsorption cassette mounting chamber 22 is allowed to enter the adsorption rotor 3 of the air to be processed. A shielding plate 23 for blocking is provided. That is, as the adsorption rotor 3 rotates, the end edges of the partition walls 21 are alternated and alternately face the shield plate 23, but any partition wall 21 faces the shield plate 23. Since the seal state is formed between the partition wall 21 and the shielding plate 23, the same adsorption cassette mounting chamber 22 is used for the passage and removal of the air Ai to be processed. The state which spreads over the passage path of air Hi simultaneously does not generate | occur | produce at all regardless of the rotational position of the adsorption rotor 3. That is, the shielding plate 23 prevents the situation that the to-be-processed air Ai and the detachable air Hi mix with the common adsorption cassette mounting chamber 22, etc.

And each partition wall 21 prevents the removable air Hi which entered the one adsorption cassette mounting chamber 22 of the adsorption rotor 3 from moving directly to another adjacent adsorption cassette mounting chamber 22, In cooperation with the partition 18 of the outlet chamber 13, the initial passage air Hof is led to the upper chamber 13a of the outlet chamber 13, and the late passage air Hor is led to the lower chamber 13b of the outlet chamber 13. Can be said to

(Configuration of Catalyst Combustion Device)

And the produced | generated enriched air Hor collect | recovered through the extraction path 15 of the concentrating apparatus 1 is supplied to the catalytic combustion apparatus 2, as shown in FIG. 1, and is post-processed here. ) Includes a combustion chamber 23 including the burning burner 23a and a combustion chamber 24 including the catalyst layer 24a. The concentrated air Hor supplied from the blowout passage 15 of the concentrating device 1 is introduced into the combustion chamber 24 through the support chamber 23, and passes through the catalyst layer 24a through the combustion chamber 24. In the passage of the catalyst layer 24, the high concentration solvent vapor in the concentrated air Hor is efficiently catalytically burned.

The catalytic combustion device 2 is provided with a preheating heat exchanger 25 adjacent to both the support chamber 23 and the combustion chamber 24. The preheating heat exchanger 25 has a function of preheating the concentrated air Hor supplied from the concentrating device 1 with the hot combustion gas G discharged from the combustion chamber 24.

(Configuration of Desorption Heat Exchanger)

In addition, a desorption heat exchanger 26 is disposed between the concentrating device 1 and the catalytic combustion device 2. The desorption heat exchanger 26 receives the high temperature combustion gas G after preheating the concentrated air Hor with the preheating heat exchanger 25 of the catalytic combustion device 2 and the introduction air OA from the outside, thereby receiving this high temperature combustion gas G. By heating the introduced air OA. The introduced air OA after heating generated by the desorption heat exchanger 26 is supplied to the concentrating device 1 as the high temperature desorption air Hi described above.

[Other Embodiments]

Here, another embodiment of the concentration apparatus of the present invention will be described.

The adsorption rotor 3 shown in the above embodiment is a disk-shaped adsorption rotor 3 mounted in a state where the cylindrical adsorption cassette 5 having a plurality of bottoms is installed side by side along the rotational direction of the rotor. The structure of the rotor is not limited to this, for example, a disk-shaped adsorption rotor for installing the blocked adsorbent layer side by side in the rotor rotation direction, and a cylindrical adsorption rotor for rotating the barrel shaft as the rotation axis, which is orthogonal to the rotation axis. The gas may be passed in a direction to pass through, or an adsorption rotor having an endless rotating body structure in which the adsorbent layer is banded.

The concentrating device of the present invention is not limited to the type using the adsorption rotor, but can also be carried out in a form in which the target gas Ai and the desorption gas Hi are converted to time and ventilated with respect to the fixed adsorbent layer. In this case, as a means of distinguishing the initial passage gas Hof and the late passage gas Hor, the valve device which converts the derivation air path of the desorption air Ho sent out from the adsorbent layer into time and divides it into the initial passage gas Hof and the late passage gas Hor. Etc. may be employed.

In the above-mentioned embodiment, although both the to-be-processed gas Ai and the desorption gas Hi have shown the example which mainly uses air, the to-be-processed gas Ai and the desorption gas Hi are not limited to what mainly uses air. In addition, as an adsorbent which comprises an adsorbent layer, of course, various things can be used according to the to-be-concentrated target component including activated carbon and zeolite.

In the concentrating device of the present invention, the point of separation between the initial passage gas Hof and the late passage gas Hor, i.e., the initial and late division points in the desorption process, is not necessarily limited to the center point of the desorption process, Therefore, it can be set near the starting point side or near the end point side of the desorption process from the center point.

Moreover, the division means can be made into the structure which can change the division point of the initial passage gas Hof and the late passage gas Hor according to various conditions. In order to actualize this according to the concentrating device 1 of the first embodiment, for example, the position of the partition 18 may be changed in accordance with the rotational direction of the suction rotor 3. In addition, in order to specify this to the fixed adsorbent layer according to the concentration apparatus of the form which converts to-be-processed gas Ai and desorption gas Hi into time, and ventilates, for example, to-be-processed gas Ai and desorption gas Hi It is sufficient to set and change the timing for switching.

It goes without saying that the concentration device according to the present invention is not limited to the concentration process of the solvent vapor contained in the exhaust air from the coating equipment. For example, it can be used for the concentration process of the air component in various fields, such as the concentration process of the washing | cleaning solvent contained in exhaust from an electronic component manufacturing facility, and the process of concentration of alcohol contained in the exhaust from a food factory. The gas to be processed and the component to be concentrated may be any. In addition, when post-treatment is performed to the produced concentrated gas, the post-treatment is not limited to the incineration treatment, but may be any post-treatment.

(Example of Exhaust Gas Treatment System Using Gas Concentrator and Gas Turbine of the Present Invention)

4 is an exhaust gas treatment system using a gas turbine for treating organic solvent-containing exhaust gas B generated in a paint shop, a semiconductor / electronic component manufacturing plant, or the like, which is shown as an application example of the concentrating device of the present invention. The exhaust gas treatment system mainly consists of the concentrator 31 and the gas turbine 56. The concentrating device 31 has the same structure as the concentrating device 1 shown in the first embodiment. The gas turbine 56 is connected with the interlocking compressor 57 provided with the gas turbine 56 and the common rotating shaft.

However, the concentrating device 31 concentrates the organic component (for example, toluene, xylene, etc.) contained in the low concentration state in the exhaust gas B of the process target introduced from the exhaust gas introduction path 40 here, and an organic component A concentrated gas C 'with a higher concentration is produced. As the concentrated form, the desorption gas C (air in this example) having a small amount of wind is introduced from the desorption gas introduction passage 44 to the degassing gas C (air in this example) than the exhaust gas B to be treated. The form which transfers the organic component in inside is employ | adopted.

The organic component is taken out by the concentrator 31, and the processed exhaust gas B '(purified gas) after being transferred to the desorption gas C is discharged to the outside through the treated exhaust gas discharge passage 41. .

In addition, the product concentration gas C 'containing the organic component extracted from the exhaust gas B by the concentrator 31 is an oxygen-containing gas for combustion, which is interlocked with the gas turbine 56 through the concentration gas discharge passage 55. It is led to the compressor 57.

The gas turbine 56 includes the product enriched gas C ′ supplied from the concentrator 31 through the peristaltic compressor 57 and the fuel G (for example, natural gas) supplied from the fuel supply path 58. Driven by combustion, it generates power.

The interlocking compressor 57 is connected with a generator 59 that generates electric power E by the power generated by the gas turbine 56. The turbine exhaust D discharged from the turbine outlet of the gas turbine 56 is guided to the exhaust boiler 61 through the exhaust passage 60. In the exhaust boiler 61, the supply water W from the water supply passage 62 is heated by the turbine exhaust D to generate a high temperature steam S. The generated electric power E by the generator 59 and the generated steam S by the exhaust boiler 61 can all be used for a plant original production operation. The turbine exhaust D 'after used for steam generation in the exhaust boiler 61 is discharged to the outside via the exhaust passage 63.

That is, in this exhaust gas processing system, by supplying the concentrated gas C 'which carried out and contained the organic component taken out from the waste gas B to be processed as an oxygen-containing gas for combustion, to the gas turbine 56 together with the fuel G, As a final step of the exhaust gas treatment following the shift of the organic component in the concentrator 31, the shifted organic component to the concentrated gas C 'is oxidized and decomposed by combustion in the gas turbine 56, and the heat of decomposition is generated. The generated power E by 59) and the generated steam S by the exhaust boiler 61 are recovered and used for efficient plant operation. In this way, the energy consumption and CO ₂ emissions as a whole plant is reduced.

In addition, since the introduction amount of the organic component into the gas turbine 56 is increased by supplying the gas turbine 56 with the concentration gas C 'having the organic component concentration increased by the concentrating device 31 as the combustion oxygen-containing gas, the gas turbine The fuel consumption of (56) is greatly reduced (in this example, it is reduced by about 60% compared to the fuel consumption in the absence of organic component introduction). This further increases the energy saving effect and the CO ₂ emission reduction effect.

The rotary adsorption-and-desorption device used for the concentrating device 31 is basically the same as that described in the first embodiment. That is, it is a rotary adsorption-and-desorption apparatus provided with the disk-shaped adsorption rotor 33 as shown in FIG. 2 and FIG. A plurality of adsorption cassettes 35 are supported by the suction rotor 33 so as to be installed side by side in the rotation direction of the rotor. Each adsorption cassette 35 is generally cylindrical having a bottom portion, and an adsorbent layer 34 made of fibrous activated carbon is provided at its periphery.

The inside of the casing 36 incorporating the adsorption rotor 33 is adsorbed by a pair of rotor periphery partitions 37 arranged in each of the vicinity of one end face and the other end face of the adsorption rotor 33. Depending on the shaft center of the rotor 33, the inlet chamber 38 facing one end surface of the suction rotor 33, the outlet chamber 39 facing the outer end surface of the suction rotor 3, these inlet chambers 38, It is divided into the suction rotor storage chamber fitted to the exit chamber 39. The introduction passage 40 of the exhaust gas B to be processed is connected to the inlet chamber 38, and the discharge passage 41 of the treated exhaust gas B 'is connected to the outlet chamber 39.

Moreover, the air path structure for passing the desorption gas C in the passage direction opposite to the exhaust gas B of a process object is provided in one part in the rotation direction of the adsorption rotor 33. As shown in FIG. The air passage structure includes an inlet chamber 42 for receiving the desorption gas B and an outlet chamber 43 for discharging the desorption gas B. The inlet chamber 42 and the outlet chamber 43 are arranged so as to sandwich a part of the suction rotor 33 between the openings of both. A desorption gas introduction path 44 is connected to the inlet chamber 42 disposed on the outlet chamber 39 side, and an adsorption rotor 33 to the outlet chamber 43 disposed on the inlet chamber 38 side. The concentrated gas introduction path 55 for taking out the desorption gas which has passed through as the generated concentrated gas C 'is connected.

4, the desorption gas introduction path 44 is equipped with the heater 52 as a desorption heat source which preheats the desorption gas C introduce | transduced into the concentrating apparatus 31. Moreover, as shown in FIG.

Regarding the detailed structure and function of this concentrating device 31, in order to improve the condensation efficiency, a partitioning tool for dividing the inside into an upper chamber and a lower chamber in the rotor rotation direction is divided into an outlet chamber 43 of the desorption gas C. It also includes the feature that it is provided, and since it is basically common to the concentrator 1 used in the first embodiment, it is omitted here.

4, the communication port 25 for discharging the initial passage gas Ba received in the upper chamber from the upper outlet part connected to the upper chamber of the outlet chamber 43 back into the inlet chamber 38 for exhaust gas B again. ) Is formed.

That is, with respect to the initial passage gas Ba which passed through the adsorbent layer 34 at the beginning of the desorption process, the concentration of organic components is insufficient and the concentration of organic components is low, and thus, through the communication port 25 to the inlet chamber 38. Discharged and passed through the adsorption region in a state of being mixed with the exhaust gas B introduced from the exhaust gas introduction passage 40 to carry out the concentration treatment again. On the other hand, the adsorbent layer 34 is passed through later in the desorption process. For the late-pass gas Bb having a high organic component concentration sent out from the lower outlet portion 24b in a state where the concentration of the organic component is sufficient, as the generated concentrated gas C 'sent to the gas turbine 56, the lower portion of the outlet chamber 43 It collect | recovers from the adsorption-and-desorption apparatus 31 through the side chamber and the concentrated gas discharge path 55 connected to it. With such a configuration, it is possible to ensure a high concentration magnification of the organic components in the gas while avoiding the influence of the initial stage of the desorption process with low desorption efficiency.

And the following example is mentioned as an example of the air volume value and concentration value of each part in the waste gas processing system of this example.

Exhaust gas B: Air volume v = 1000㎥ / min

Organic ingredient concentration d = 100 ppm

Concentrated gas C ': Air volume v = 33㎥ / min

Organic component concentration d = 3000 ppm (thus the concentration factor obtained is 30 times)

Generated power E = 100kW of the generator 59

Fuel Consumption of Gas Turbine 56 G = 231000kca1 / h

Generated steam amount S = 400kg / h of the exhaust boiler 61

Temperature of discharge turbine exhaust D '= 200 to 250 ° C

The exhaust heat of the turbine exhaust C is recovered and used in the form of steam S using the exhaust boiler 61, but hot water and hot air are generated by the heat of the turbine exhaust D 'using various types of heat exchangers. The recovery use form of the retained heat of the turbine exhaust D 'can be changed in various ways.

In addition, the power E generated by driving the generator 59 by the gas turbine 56 or the heat recovered from the turbine exhaust D 'may be used for any purpose. It is not limited to using in generating facility, You may use in facility different from generating facility of exhaust gas B.

The concentration of the organic component of the concentrated gas C 'supplied to the gas turbine 56 as the oxygen-containing gas for combustion is preferably set to 3000 ppm or more, but the specific concentration value may be determined depending on the conditions and the like, and in some cases, to 3000 ppm or less. You may also Moreover, although air was used as desorption gas C used as the mother gas of concentrated gas C 'in the above-mentioned embodiment, it uses the adsorption-desorption apparatus as the mother gas of concentrated gas C' (concentrator 31). In the case, the desorption gas C) can employ various gases, not limited to air, as long as the concentrated gas C 'generated using the same is used as the combustion oxygen-containing gas of the gas turbine 56.

The exhaust gas treatment system described above can be applied not only to organic solvent-containing gases generated in paint shops and semiconductor and electronic component manufacturing plants, but also to the treatment of exhaust gases containing various organic components.

According to the present invention, by the rational treatment configuration, in this kind of airborne component concentrating device, the concentration magnification can be effectively increased without enlarging the device or lowering the processing capacity.

Claims (3)

Air component concentrating device for concentrating the concentrated component contained in the to-be-processed gas-This air component concentrating apparatus passes the said to-be-processed gas to an adsorbent layer, and transmits the to-be-concentrated component in the to-be-processed gas to an adsorbent layer. And a concentrated component adsorbed to the adsorbent layer in the adsorption process by passing a desorption gas having a higher air flow rate than the gas to be treated to the adsorbent layer which has completed the adsorption process. In the desorption gas, the desorption process of desorption is repeated, and the desorption gas sent out from the adsorbent layer in the state of containing the desorbed concentrated component in the desorption process can be recovered as a product concentration gas. The airborne component concentrating device passes the desorption gas sent from the adsorbent layer in the desorption process and passes through the adsorbent layer at the beginning of the desorption process in which the adsorbent layer has not yet been sufficiently heated by a high temperature desorption gas. Classification of a gas which is divided into an initial pass gas having a low concentration of the concentration of the component to be concentrated and a late passage gas having a high concentration of the concentration of the component which has passed through the adsorbent layer at the end of the desorption process in which the adsorbent layer is sufficiently heated by a high temperature desorption gas. Way, A reciprocating passage for passing the initial passage gas as part of the gas to be treated and passing it back to the adsorbent layer in the subsequent adsorption process; and Blowing-out furnace which blows out the said late pass gas as a product concentration gas Air component concentration apparatus comprising a. The method of claim 1, The airborne component concentrating device further has a rotatable adsorption rotor for supporting the adsorbent layer, the adsorbent layer extending in the rotational direction of the adsorption rotor, and the target gas is predetermined in the rotation path of the adsorption rotor. The adsorption treatment area | region which passes the said adsorption agent layer of the site | part of the said adsorption rotor in the middle of passage inside, and the desorption treatment area | region which passes the said desorption gas to the said adsorption agent layer of the site | part of the adsorption rotor in the middle of passage in a predetermined | prescribed rotor Installed side by side in the direction of rotation, The gas dividing means is composed of a partition that divides the outlet of the desorption gas in the desorption treatment region into an upper outlet portion located above the suction rotor rotation direction and a lower outlet portion located below the rotor rotation direction. under, The said return path guides the said desorption gas sent from the said upper outlet part to the inlet of the to-be-processed gas in the said adsorption process area | region, The extraction path recovers the desorption gas sent from the lower outlet portion as a product concentration gas. Air component concentrating device. The method of claim 2, The partitioning device is an airborne component concentrating device which is provided to be set and changeable in position in accordance with the rotational direction of the suction rotor.